"lessus" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "ine-pro",
        "3": "*leh₂-"
      },
      "expansion": "Proto-Indo-European *leh₂-",
      "name": "der"
    },
    {
      "args": {
        "1": "la",
        "2": "latrō"
      },
      "expansion": "latrō",
      "name": "m"
    },
    {
      "args": {
        "1": "la",
        "2": "lāmentum"
      },
      "expansion": "lāmentum",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "λῆρος"
      },
      "expansion": "Ancient Greek λῆρος (lêros)",
      "name": "cog"
    },
    {
      "args": {
        "1": "grc",
        "2": "λάλος"
      },
      "expansion": "λάλος (lálos)",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "λάσκω"
      },
      "expansion": "λάσκω (láskō)",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Indo-European *leh₂- (expressive root). Cognate with latrō, lāmentum, Ancient Greek λῆρος (lêros), λάλος (lálos), λάσκω (láskō).",
  "forms": [
    {
      "form": "lessum",
      "tags": [
        "accusative",
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "noun",
        "3": "accusative singular",
        "4": "lessum",
        "g": "m"
      },
      "expansion": "lessus m (accusative singular lessum)",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "la",
          "name": "Funeral",
          "orig": "la:Funeral",
          "parents": [
            "Death",
            "Industries",
            "Society",
            "Body",
            "Life",
            "Business",
            "All topics",
            "Human",
            "Nature",
            "Economics",
            "Fundamental",
            "Social sciences",
            "Sciences"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "wailing, cry, funeral lamentation"
      ],
      "id": "en-lessus-la-noun-XAOwdPcp",
      "links": [
        [
          "wailing",
          "wailing"
        ],
        [
          "cry",
          "cry"
        ],
        [
          "lamentation",
          "lamentation"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "lessus"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "ine-pro",
        "3": "*leh₂-"
      },
      "expansion": "Proto-Indo-European *leh₂-",
      "name": "der"
    },
    {
      "args": {
        "1": "la",
        "2": "latrō"
      },
      "expansion": "latrō",
      "name": "m"
    },
    {
      "args": {
        "1": "la",
        "2": "lāmentum"
      },
      "expansion": "lāmentum",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "λῆρος"
      },
      "expansion": "Ancient Greek λῆρος (lêros)",
      "name": "cog"
    },
    {
      "args": {
        "1": "grc",
        "2": "λάλος"
      },
      "expansion": "λάλος (lálos)",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "λάσκω"
      },
      "expansion": "λάσκω (láskō)",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Indo-European *leh₂- (expressive root). Cognate with latrō, lāmentum, Ancient Greek λῆρος (lêros), λάλος (lálos), λάσκω (láskō).",
  "forms": [
    {
      "form": "lessum",
      "tags": [
        "accusative",
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "noun",
        "3": "accusative singular",
        "4": "lessum",
        "g": "m"
      },
      "expansion": "lessus m (accusative singular lessum)",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Latin entries with incorrect language header",
        "Latin entries with topic categories using raw markup",
        "Latin lemmas",
        "Latin masculine nouns",
        "Latin nouns",
        "Latin terms derived from Proto-Indo-European",
        "la:Funeral"
      ],
      "glosses": [
        "wailing, cry, funeral lamentation"
      ],
      "links": [
        [
          "wailing",
          "wailing"
        ],
        [
          "cry",
          "cry"
        ],
        [
          "lamentation",
          "lamentation"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "lessus"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: declension unknown",
  "path": [
    "lessus"
  ],
  "section": "Latin",
  "subsection": "noun",
  "title": "lessus",
  "trace": ""
}